Supply conduit for steam and gas turbines



.Ewneg9 w32. G.` BAUER ET AL s SUPLY CODUIT FOR STEAM AND GAS TURBINES.

Fied Nove, 1930 IIR a' I a ,mail/@m9 @fs/mf Sauer 6dr/ 5mm/'eske '50 pansion of the w Patented June/ 9, 19.31

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GUS'JJAV' BAUER, F HAMBURG, AND CARL H 0F BBI-im', `GERMANY' V SUPPLY CONDUIT FOB. STEAM GAS TUnBNS Application ille-d November 6, 1930, Serial No. 493,889, and in Italy October 80, 19.29.

Since super-heated lsteam usually expands considerably in the first stage of a turbine and -thus falls considerably 1n pressure and.

temperature it is always attempted to make 5 the contact surface between the incoming hot steam or the hot steam conduit and the turbine casing as small as possible because the great temperature difference between the steam conduit and the turbine' casing produces stresses in the material which often lead to cracks. For the same reasons it is also notadvisable to conduct the fresh steam through annular conduits cast in the casing since these conduits must then take the temperature of the incoming steam whereby stresses in the materialwith respect to other cooler parts of the casin are produced which mag very easily cause amage.

co'rding to the invention to overcome '20 the above mentioned disadvantage the supply conduits leading tothe nozzle casing arranged in the known manner in the turbine casing is so arranged' that the contact and sealing places between the fresh steam or gas supply conduit and the nozzle casing ,is reduced to a very small size. This sealing surface is at the same time so arranged that it can be formed in the most convenient manner in the lathe. The nozzle casing is held in the axial direction by a concentric groove y casing care so constructedthat'they onl -bear with small cylindrical surfaces whic can bemade on the lathe against thev nozzle caafzingd,` thesesurfaces actingas contact and y surfaces. The sealing surfaces c pro- "ate space e is left between the casin a and tly inwardly vso that an intermedithe nozzle casn which rmts exe galis' of thepecasing and the nozzle casing. Axial dis lacement .of the nozzle casing is prevente groove and rib connection f, g, with the casing. n v Y Pressing of the sealing surfaces is eiected by bolts-or screws 'h wh1ch 'can be ti htened from outside the casing. In order t at the nuts or screws may be kept out ofthe cur-,-

rent of steam or as and prevented from falling into the nozz e casing, the are arranged outside an inset piece z' inserte 'in the connection b. This inset vpiece also protects the surroundin p casing walla ainst the harmful eifectsi 0% the flowing. higlyheated steam or as. Further it 'is formed, as the example in igure 2 shows, so that elicient flow of steam or gas is obtained. According to Figure 3 it can be constructed asa steam strainer lo of known kind.- .f

According t'o Figure 3 the nozzle casing simultaneously forms the guide plate carrier m, in known manner.

What we claimI is 1. A turbine including a main casing and havin an opening leadmg into the interior of sai casing, a motive fluid supply connection on said casing and registering with said openin and larger than the latter, a remova le tu ular member within said connection and having a passage aligned with said opening, and having the peripheral wall thereof spaced fromv the wall of said connection said tubular memberbeing provided with a ange at the inlet end, and extending to the wall of said conduit so as to leave an annular space,

by a concentric l a nozzle casing disposed entirely in said main casing, and securing members connectin said nozzle casin to said main casing, an having portions t ereof extending into said space, whereby said securing-members are protected'from the stream of motive fluid. y

2.. A turbine includingfa main casing having an openin leading into the interior thereof, a motive uid supply connection on said I casing and registering with said opening, a steam strainer di sed in said connection and havin the wa thereof spaced from the wall of -saidconnection, a nozzle casing dissed entirely within said main casing, and

lts connectmg said nozzle casingto nid main casing, said bolts extending between said steam strainer and said connection, whereby said bolts are out of the path of the supply stream ofV motive fluid.v

3. A turbine including a main casing having a radially extending inlet opening on the peripher thereof, the peripheral wall of said casing being provided with a radially inwardly facing annular lseat surrounding saidl opening, a nozzle casing dis osed entirely inside said main casing, and aving an inlet registering with said opening, said nozzle casin havm a portion encirclin said inlet, an in sur ace contact with sai seat and means accessible from the exterior of said main casing and projecting through the wall thereof for securmg saidnozzle casing in position.

In testimony whereof We have signed our 'names to this specication.

GUSTAV BAUER. CARL SCHMIESKE.

alsy 

